Quote:
Originally Posted by RSTarga
I think there are some mistaken ideas here about water+ethanol+gasoline
In the old days when gasoline was just gasoline water would sink to the bottom of the tank .
Once ethanol was added water was absorbed by the alcohol and since most cars are fuel injected sprayed into the combustion chambers, ( it settles out at the bottom of carbs). The stabil keep s the gas from aging and lubricates and cleans the lines. Some just add marvel mystery oil.
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Not true.
I have personally performed this experiment in a real laboratory. Any liquid water addition to gasoline removes alcohol from gas. This is for any mix below E60 (60% ethanol/40% gasoline) At E60 and above, the amount of water it takes to get water saturation in the hydrocarbon phase is pretty small, until you start getting to E90 and above. It's not a straight-line curve, either.
For blends of E10 (or near it), any liquid water that gets into the tank will absorb ethanol out of the gasoline such that you get roughly a 30% ethanol/70% water mix, and then everything is in equilibrium.
Trace amounts of water can be soluable in a gas/ethanol mix near E10. But once you get liquid water in the system, all bets are off.
In my experiment, I was able to get about 2 parts per ten thousand of liquid water to go into solution, but that was with *vigorous* mixing over the course of 10 minutes. After that amount went in, there was no amount of mixing that would do anything.